Wednesday 1 February 2012 

Speaker: Dr. Anatael Cabrera (National Institute of nuclear and particle physics (in2p3) )

Title: "Double Chooz. Our first word on Theta13"

Abstract:
The Double Chooz neutrino oscillation experiment has released its first preliminary
results on theta13 in LowNu12 conference (Seoul, Korea). The Double Chooz experiment
relies on nuclear reactor neutrinos propagating over 1km till the far-detector to 
measure neutrino oscillation via disappearance. A slight deficit of the expected 
neutrinos has been measured. The deficit is consistent with a positive theta13
oscillation signal. The significance of the measurement is <2sigmas. This measurement
is consistent with several pieces of evidence (with similar level of significance),
all pointing, if correct, towards a rather "large" value (around the CHOOZ bound)
of theta13. The combined evidence suggests that theta13 is not null to >3sigmas.
In this seminar, I will describe how the Double Chooz collaboration has performed
the released measurement, the exciting scenario regarding theta13 and, also, the
possible improvement expected by Double Chooz in the very near future.